For this animation I used a hair particle system with some child particles emitted form a cube in blender. The hair gets influenced by different forcefields over time. The child particles on the left side of the cube didn't work as expected. I will make some more experiments and try to fix this.

For this animation I used 3 different particle systems and one that uses them as target for a keyed particle system.

The first particle system has no physics at all and sits on a cube. The second particle system uses fluid particles.
And the third one uses newton particles on an ico-sphere that get influenced by a forcefield.